Union-coupling.



No. 680,649. Patented Aug. I3, |901.

H. S. CRONIBIE.

UNION GOUPLING.

(Application led Feb. 25, 1901.)

(No Model.)

UNITED STATES v PATENT OFFICE.

IIERBERT S. CROMBIE, OF WOBURN, MASSACHUSETTS, ASSIGNOR TO THE JEFFERSONMANUFACTURING COMPANY, OF SAME PLACE.

UNION-COUPLING.-

SPECIFICATION forming' part of Letters Patent No. 680,649, dated August'13, 190i. Application tiled February 25, 1901. Serial No. 48,832. (Nomodel.)

.To @ZZ whom, t may concern:

Be it known that I, HERBERT S. CROMBIE, a citizen of the United States,residing at Woburn, in the county of Middlesex and State 5 ofMassachusetts, have invented certain new and useful Improvements inUnion-Couplin gs, of which the following is a specification. Myinvention relates to union-couplings in which a hard-metal packing. ringor seat is Io permanently and securely fastened Within a recess in themember ofthe coupling to which it is applied. In couplings of thisdescription as heretofore constructed the interior diameter of thepacking-ring was equal to or I5 less than that of the screw-threadedinterior of the coupling member to which it was applied, so that theinner end of the packingring formed a shoulder against which the threadof a pipe if screwed far enough into zo the coupling, as often occurs,would strike, causing the packing-ring to be forced outvof place orjammed, thus injuring the coupling. To overcome this difflculty is theobject of my invention, which consists in the combi- 2 5 nation, withtwo opposing members of a coupling held together by a nut or by means offlanges and bolts, of a metal packing ring or seat permanently securedwithin an annular recess in one of said members and having 3o itsinterior diameter greater than that of the threaded bore 0f thecoupling, whereby the inner wall of the recess in which said ring isplaced is caused to form an annular protecting-flange lyingwholly-Within the packing- 3 5 ring, which is thus held securely inplace and at the same time entirely removed from the path of a pipescrewed into the coupling,which cannot Linder any circumstances comeinto contact with the packing-ring, as hereinafter 4o more fully setforth.

In the accompanying drawings, Figure l is a side elevation of myimproved union-coupling. Fig. 2 is a longitudinal vertical section ofthe same. Fig. 3 is a side elevation illus- 45 trating the applicationof my invention to a modified form of coupling. Fig. 4 is a lonwithinthe opposing face of which is formed an annular recess b, in which ispermanently secured, by driving it therein or in other suitable manner,a metal packing-ring c, prefer- 55 ably of bronze or brass, said ringhaving a concave face d, against which bears the convex face a of thememberA, said members A and B being interiorly threaded to receive thecorrespondingly-threaded ends of the 6o pipes D E, which are connectedby means-ot' the coupling.

C is the coupling-nut, which is interiorly threaded, as usual, at f,vthe female membe'r B being correspondingly threaded to en- 65 gage thethreaded portion of the nut, While the male member is provided with ashoulder g, having an outer convex or beveled surface, against whichbears the correspondingly curved or concave interior surface of the in-7o wardly-projecting fiangc h of the couplingnut C, which thus holds thetwo members A B together in such manner as to permit of a movement ofone upon the other in the arc ot' a circle without any liability ofleakage in 75 case the pipes which are connected by said coupling shouldbe thrown or moved out of alinement by accidentor design or if it shouldbe found necessary to couple two pipes together which are not in aperfectly straight 8o 'face by the metal of which the member B iscomposed, and as no portion of the ring projects into the threadedinterior of the coupling it is impossible for the end of the pipe 95 Ewhen screwed into the coupling to come into contact therewith under anycircumstances whatever, and consequently the packing-ring always remainsin place, being protected on all sides except its concave face by roothe metal walls of the recess b within which it is placed.

Figs. 3 and 4 illustrate the application of my invention to a couplingthe tWo members of which are connected by means of external tlanges m n,spaced apart, and bolts p, the lian ge 'm being formed integral with themember B, While the flange In consists of an independent annulus or ringloosely slipped over the outer end of Vthe member A and taking a bearingagainst its shoulder g, the surface of Which is convex and forms a seatfor the correspondingly-concave inner peripheryr of the ring-shapedflange n. No portion of the packing-ring c extends into the space beitween the flanges which are spaced apart when held by the bolts p, andconsequently the packing-ring does not in any manner interfere with thefree movement in the arc ot' a ci rcle of one member upon the other.

That portion ofthe construction of the coupling by means of which onemember is vpermitted to move in the arc of a circle upon the othermember forms, however, no part of my invention,which relates Wholly tothe manner in which the metal packing-ring is applied so as to receiveprotection on all sides except ,v

next the bore by the llange k, the metallic,

packing-ring c secured in said recess wholly exterior to the boreof themember B and having a concave face engaging the convex face of themember A, and means for coupling the coupling members togetherconstructed to permit them to move independently of each other in thearc of a circle.

Witness my hand this 20th day of February, A. D. 1901.

HERBERT S. CROMBIE. In presence of P. E. TESOHEMACHER, LILLIAN I.BAsFoRD.

